diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
index cff646d..697c603 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/LanguageSelectWidget.php
@@ -27,10 +27,35 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $element['value'] = $element + array(
       '#type' => 'language_select',
       '#default_value' => $items[$delta]->value,
-      '#languages' => LanguageInterface::STATE_ALL,
+      '#languages' => $this->getSetting('include_locked') ? LanguageInterface::STATE_ALL : LanguageInterface::STATE_CONFIGURABLE,
     );
 
     return $element;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function defaultSettings() {
+    $settings = parent::defaultSettings();
+    $settings['include_locked'] = TRUE;
+
+    return $settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsForm(array $form, FormStateInterface $form_state) {
+    $element = parent::settingsForm($form, $form_state);
+
+    $element['include_locked'] = [
+      '#type' => 'checkbox',
+      '#title' => $this->t('Include locked languages such as <em>Not specified</em> and <em>Not applicable</em>'),
+      '#default_value' => $this->getSetting('include_locked'),
+    ];
+
+    return $element;
+  }
+
 }
diff --git a/core/modules/language/config/schema/language.schema.yml b/core/modules/language/config/schema/language.schema.yml
index 5e3f55b..91ce2d1 100644
--- a/core/modules/language/config/schema/language.schema.yml
+++ b/core/modules/language/config/schema/language.schema.yml
@@ -131,3 +131,11 @@ condition.plugin.language:
       type: sequence
       sequence:
         type: string
+
+field.widget.settings.language_select:
+  type: mapping
+  label: 'Language format settings'
+  mapping:
+    include_locked:
+      type: boolean
+      label: 'Include locked languages'
diff --git a/core/modules/language/language.install b/core/modules/language/language.install
index dcec16a..45d2acb 100644
--- a/core/modules/language/language.install
+++ b/core/modules/language/language.install
@@ -5,9 +5,27 @@
  * Update functions for Language module.
  */
 
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
+
 /**
  * Rebuild the container as services changed.
  */
 function language_update_8001() {
   \Drupal::service('kernel')->invalidateContainer();
 }
+
+/**
+ * Add the 'include_locked' settings to the 'language_select' widget.
+ */
+function language_update_8002() {
+  foreach (EntityFormDisplay::loadMultiple() as $display_form) {
+    $content = $display_form->get('content');
+    foreach (array_keys($content) as $element) {
+      if (isset($content[$element]['type']) && $content[$element]['type'] == 'language_select') {
+        $content[$element]['settings'] = ['include_locked' => TRUE];
+        $display_form->set('content', $content);
+        $display_form->save();
+      }
+    }
+  }
+}
diff --git a/core/modules/language/tests/src/Kernel/LanguageSelectWidgetTest.php b/core/modules/language/tests/src/Kernel/LanguageSelectWidgetTest.php
new file mode 100644
index 0000000..966275c
--- /dev/null
+++ b/core/modules/language/tests/src/Kernel/LanguageSelectWidgetTest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Drupal\Tests\language\Kernel;
+
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Tests the language select widget.
+ *
+ * @group language
+ */
+class LanguageSelectWidgetTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'entity_test',
+    'language',
+    'user',
+    'system',
+  ];
+
+  /**
+   * The entity form display.
+   *
+   * @var \Drupal\Core\Entity\Entity\EntityFormDisplay
+   */
+  protected $entityFormDisplay;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installEntitySchema('entity_test');
+    $this->installEntitySchema('user');
+
+    $storage = $this->container->get('entity_type.manager')->getStorage('entity_form_display');
+    $this->entityFormDisplay = $storage->create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'default',
+      'status' => TRUE,
+    ]);
+  }
+
+  /**
+   * Tests the widget with the locked languages.
+   */
+  public function testWithIncludedLockedLanguage() {
+    $this->entityFormDisplay->setComponent('langcode', [
+      'type' => 'language_select',
+    ])->save();
+    $entity = EntityTest::create(['name' => $this->randomString()]);
+    $form = $this->container->get('entity.form_builder')->getForm($entity);
+    $options = array_keys($form['langcode']['widget'][0]['value']['#options']);
+    $this->assertSame(['en', 'und', 'zxx'], $options);
+  }
+
+  /**
+   * Test the widget without the locked languages.
+   */
+  public function testWithoutIncludedLockedLanguage() {
+    $this->entityFormDisplay->setComponent('langcode', [
+      'type' => 'language_select',
+      'settings' => ['include_locked' => FALSE],
+    ])->save();
+    $entity = EntityTest::create(['name' => $this->randomString()]);
+    $form = $this->container->get('entity.form_builder')->getForm($entity);
+    $options = array_keys($form['langcode']['widget'][0]['value']['#options']);
+    $this->assertSame(['en'], $options);
+  }
+
+}